这是一个预演，如何能掌握截图的一个网页，不使用打印屏幕。

This is a preview of How to capture a screenshot of a web page without using Print screen.

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在Merlin的魔力的下一部分，您将了解如何打印屏幕或组件的内容。

In the next installment of Magic with Merlin, you'll learn how to print the contents of a screen or component.

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本文叙述了如何在普通24针彩色打印机上打印高分辨率彩色图像的方法，并用汇编语言编写了打印屏幕图像的程序。

The method of printing high resolution colour images on the common 24 pins colour printers is described in this paper, and the program of printing screen images is compiled by assembler language.

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If you scroll back up on the printout or screen here, you'll see that you can actually not only declare function's prototypes, their general structure.

如果我回滚到打印输出或者这个屏幕，你们将看到你们不仅可以声明函数的原型,它们的一般结构。

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But what you would have seen is the program just doing this, printing out to the screen.

但是你看到的只是程序，打印字符串到屏幕上。

哈佛公开课 - 计算机科学课程节选

I don't have to go read what it printed out in the screen. This has returned a value that I can use. Because I could do a test to say, is this a return value? If it's not, I'll do something else with it. So the binding is still there, it simply doesn't print it out.

我不想读到屏幕中打印出来的这行字,程序返回过一个我能够使用的值,因为我可以做个小测试，来说明这是否是返回的值，如果不是，我可以做一些其它的事,而这个绑定依然在这儿，没有打印任何东西。

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